Which of the following is responsible for putting nitrogen back into the air? a. photosynthesis
b. Nitrification
c. Excretion
d. Decomposers

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

Which of the following is a common response to cell signaling?

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?